Extended reality technologies, encompassing virtual, augmented, and mixed reality, are fundamentally revolutionising aviation maintenance training by providing safe, immersive environments for complex procedures. Industry leaders like Mass Virtual and Adaptive Immersion utilise these tools to decouple training from physical aircraft availability, significantly reducing aircraft downtime and operational costs. These virtual platforms enable technicians to practice high-consequence, low-frequency tasks repeatedly, thereby enhancing safety and skill retention during the vulnerable early stages of employment. Despite ongoing challenges such as equipment durability, lighting limitations in augmented reality, and occasional user discomfort, the technology delivers measurable performance improvements. Ultimately, these immersive solutions bridge the gap between theoretical knowledge and practical application, ensuring greater efficiency and readiness across global maintenance operations.